Regie : Ian Barber, Mit : Lorna Watson, Virginia Fiol, Ami Metcalf,

A skeleton found buried in Edie Paignton's allotment is difficult for Sister Boniface to identify as male or female. Paignton's husband has disappeared, as has Frank Harsden's pregnant daughter Jenny. More tests by Sister Boniface reveal the victim had been murdered with a cultivator and buried in a caustic soda mixture.